-blast. A suffix meaning an immature precursor cell of the type indicated by the preceding word. [G. blastos, germ]. immature precursor cell type; the cell type is denoted by the preceding syllables, e.g. osteoblast.
(plural defining moments) A moment in time that defines something, such as a person's success or failure, achievement or demise, talent, etc. A point at which the essential nature or character of a person, group, etc., is revealed or identified.
[countable] a particular moment in time at this/that point: At that point we all got up and walked out of the room. at this/that point in time: At this point in time we canât afford to hire any more people. Synonyms and related words. Moments and short periods of time:moment, second, instant... Explore Thesaurus.